surround, then there was 5.1 channel surround, then there was 6.1 channel surround, and now there's an official 7.l channel surround. What'll be next? Look at the trend. First there was 4 channel, which was the left center right and surround. Then there was 5.1 channel, a huge jump from 4 channel surround. It gave way to 5 discrete channels and 1 lfe. For that there was FL, C, FR, SL, SR Then there was 6.1 channel, a derivative of 5.1 and 4 channel surround. The rear array is similar to 4 channels minus the surround. Now there's 7.1 channel, seems like a full derivative off of 5.1 and 4 channel surround. Utilizing the "LCR" of the 4 channel surround to derive the rear channels. However, unlike 6.1, 7.1 seems to utilize LCRS. Not to say that that's how it exactly is, but is anybody else seeing this pattern? Soon, with fully discrete 5.1 audio, they'll be matrixing material similar to PL2 to yield 8.1 channel audio. I don't think 8.1 would ever reach home though. Unless they decide to have an overhead effects channel, but that'd be too much trouble. p.s. by they I mean dolby, since DTS doesn't utilize matrix decoding except with Neo.